[PATCH] siggen: Fix a subtle bug in hash calculation for shared work tasks

[PATCH] siggen: Fix a subtle bug in hash calculation for shared work tasks

[Richard Purdie]

With a shared work task like gcc, the task can be run from a variety of
different recipes which may have different virtual extensions in place.

Depending on whether gcc-runtime or nativesdk-gcc-runtime's do_preconfigure
task is called for example will change the sorting of the task hashes due
to the way clean_basename currently works.

The correct thing to do here is sort on the base filename first, then any
extension when ordering the hashes. This means we do account for things
like recipes with both a native and non-native dependency but we also fix
the shared work case where we don't care whether it was a virtual version
or not.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 933311c..548f50d 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -295,7 +295,7 @@ def dump_this_task(outfile, d):
 
 def clean_basepath(a):
     if a.startswith("virtual:"):
-        b = a.rsplit(":", 1)[0] + ":" + a.rsplit("/", 1)[1]
+        b = a.rsplit("/", 1)[1] + ":" + a.rsplit(":", 1)[0]
     else:
         b = a.rsplit("/", 1)[1]
     return b

Re: [PATCH] siggen: Fix a subtle bug in hash calculation for shared work tasks

[Peter Kjellerstedt]

> -----Original Message-----
> From: bitbake-devel-bounces@lists.openembedded.org [mailto:bitbake-
> devel-bounces@lists.openembedded.org] On Behalf Of Richard Purdie
> Sent: den 23 augusti 2014 10:23
> To: bitbake-devel
> Subject: [bitbake-devel] [PATCH] siggen: Fix a subtle bug in hash
> calculation for shared work tasks
> 
> 
> With a shared work task like gcc, the task can be run from a variety of
> different recipes which may have different virtual extensions in place.
> 
> Depending on whether gcc-runtime or nativesdk-gcc-runtime's
> do_preconfigure
> task is called for example will change the sorting of the task hashes
> due
> to the way clean_basename currently works.
> 
> The correct thing to do here is sort on the base filename first, then
> any
> extension when ordering the hashes. This means we do account for things
> like recipes with both a native and non-native dependency but we also
> fix
> the shared work case where we don't care whether it was a virtual
> version
> or not.
> 
> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
> 
> diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
> index 933311c..548f50d 100644
> --- a/bitbake/lib/bb/siggen.py
> +++ b/bitbake/lib/bb/siggen.py
> @@ -295,7 +295,7 @@ def dump_this_task(outfile, d):
> 
>  def clean_basepath(a):
>      if a.startswith("virtual:"):
> -        b = a.rsplit(":", 1)[0] + ":" + a.rsplit("/", 1)[1]
> +        b = a.rsplit("/", 1)[1] + ":" + a.rsplit(":", 1)[0]
>      else:
>          b = a.rsplit("/", 1)[1]
>      return b

After the rewrite above, this can be simplified as:

def clean_basepath(a):
    b = a.rsplit("/", 1)[1]
    if a.startswith("virtual:"):
        b += ":" + a.rsplit(":", 1)[0]
    return b

//Peter